It can be agonizing selecting the right feats. Never mind the fact that the average character gets a mere seven of them over the course of a full adventuring career - you also have to worry about when their payoff is. What's better: the feat that's useful now but negligible at high level? Or the feat that's useless because it's just a prerequisite for something really juicy down the line? Neither sounds particularly attractive, and while you might recall that a casting of heroics or mirror move can score you bonus feats at a moment's notice, not all of us can cast wizard spells, thank you very much. Is there some feat that can not only be tooled to virtually any build, spellcaster or not, but also can be swapped out or updated so there's no point in the campaign in which it loses its luster?
You might be expecting you'll have to look pretty far afield to find such a lofty feat. You'd be right - in fact, you're going to have to look on whole other planes of existence. Today we're discussing Planar Touchstone, the feat that asks of you more than most, but may well be worth it in return.